rate of dec of height -dh/dt = (av²)/I² where v is velocty of efflux=^{[2 ]}2gh

u know dielect cons connect 2 plates in parallel . find capacitance as fn of E and current or charge at any inst. integrate from time 0 to t.

u can get the ans. very lenghthy quest.

it ud be good if we dont waste time in integrating and calulating it only process is imp.

NOTE: E remains cons so pot diff is const. only C changes so current is changing

 

 

i am sendin many ans but of no use. so if u like it plz. rate i am forced to say....